Apparatus for detecting the presence of gas



eifel-nin@ oeniose of reses the ex,

SFECIFIGATXON forming o @lettere Fatemi. ??lo.

Application filed l-Jeeeinlior ll 159i.

:Gli @if 3317.35, dated November 2%, 3365 Serial No. 150,206, (Nomodel.)

To au' whom it may cof/Loewe:

Be it k nown that l) GEORGE l North llliddleboiongll, County of (I 1 andState of lilesseelinsetts, have invented Improvement in Appare-tus foillelieeting tno Presence of Gas, of which the following (lesei'iption ineonneetion with the neeonlpzinying drawing is :1 'speoilleationn Thisinvention felntes to on opposti for detecting the piesenee of t foeignin ille air-as, .Toi instance, fordeteeting the presence of eonl oililluminating gus.

The eseepeof ordinary illnininzttinggns is of common occurrence incitiese caused by some leakage in the pipes or meters, or by carelesslyturning on and off n jet, and suoli escape is frequently attended withserions re- Snlts, Snell as sni'i'oeation.

The object of the present invention is to produce a simple and cheapapparat-ne for detecting the presence of the end predileing o. signalwhen danger is at illus obviating any serions resulte which nightfollow.

The invention consists, essentially, of el closed vessel or eliomoermade of e. peren, materiel, and provided With eii'enit-elosez operatedby the Volume of gas contained Within tlie sind vessel or chamber, saidoir i1-it olosei` controlling a signaling devise. The closed vessel orelminnei normally contati air, and when e different ges @einen in noni'il A.,

the some through. its oneens Welle the air ont' ont owingY to noti nllewe entere innen 'netei than through the poione Welle;

operates the oienitelose te igual. The eirenit-elose' in this consist-Sof a tube, one end of wliieli goes-Ses through ille Walls of end iseealed to the cloned 'vessel or chamber, and its opposite icircuit-Closer, by which the sienal eentrolled.

The drawing shows 1n longitudinal seetion ndicnting ille presence o withthis invention, 1 ng devine being shown in elosed vessel oi' elieinbeiil, made of porous enitlienwzne or other nimble material, und ofsuitable size, is intended to be placed at any desii'ed Spot where isLl' eiied 'to eeeertoin the presenee of a' foi'eign ges in theatmosphere-as, foi insnnee, over n openingn in lille door above :igas-pipe. This vessel Aie i et one end with eeii'enit- Closer, shown intins instencoas e tube, n, one end ol' wliieli. passes through and issealed to one well ol' inne chemo-ei', its opposite end loeing j-Shnped,es at b, This Uelmped poi'- Fi is partially iilled with oeondnetinglillitl ewmieli, .foi inetanee, n.5 dilute SnlpliniioeeiflMnnC. into the open end of this poition Zi in dropped the terminals2 3 the oiienit ofllie battery. B, being noiinnlly neovo the level ol'the liquid in the seine binnen ol' the ill-shaped portion. l aleoprovide the n: tus 'the Signaling devine, eliov .f'ibinting bell ineirenit l line l l l, it comprising a magnet, my, n Spiing-eonti'olle"itlinatnie, in, to Wli'el; eoliano ted ille striking devel', and 'thelie/Jl; eontz'Let-noi 1 m,

The operation of the eppoi-aine is dependent upon, the netninlphenomenon eoniinonly tei'nietl U osmose of gases." The veseel isnormally' filled Wit-"n ai? (the saine and the liqnid in the Sinni e l"niinie, being snostzu. Sinne le in Toe-lli broneliee, and einenit onennl when n dix'ei'ent gne eonee in nro'ngli jpecons walls thereof; ont,owing to the lewe which govern suoli phenomenon, external enters feste'thon alle elii eeonpes theol-gli the Walls, thus joonnning a el ige intile plessni'e Within ille elieiinoe, Wliien eensee 'l liquid in thetube to and elose the eirenit, causing ille Signal 'to oper ale.

is obvious 'the eiieizlit-terminefs if pees into the inner binnen of thetnoe n, eii'enit-temninnle dip into the liquid, will time retain tl eoirenit 11min-illyelosed7 in einen cese signaling-instrument of sneliefeeter would lie opeioted by the opening of le @Ji/zenit,

ICO

I elaim- In testimony whereof I have signed my io An apparatus fordetecting the presence of name to this specification in the presence ofa gas, consisting of a closed vessel having two subscribing Witnesses.

porous Walls, and a circuit-controlling device 5 operated by variationsin pressure of the air' 1 GEORGE H. EATON.

in the said vessel when in the presence of gas,

and a signaling device controlled thereby, the Witnesses:

parts being combined to operate substantially BERNICE J'. NoYEs,

as described. Y Jos. P. LIVERMORE

